The difference between in the unit prices is $0.04.
What is unit price?
The unit price of an item is the cost per unit of the item.
Formula for the calculation of unit price:
[tex]unit price=\frac{quantity}{Total Price}[/tex]
According to the question
we have,
Cost of 5-lb bag of apples is $4.50
⇒cost of 1-lb bag of apples[tex]=\frac{4.50}{5}=[/tex] $0.9
Cost of 8-lb bag of apples is $7.52
⇒ cost of 1-lb bag of apples [tex]=\frac{7.52}{8} =[/tex]$0.94
Therefore,
The difference in unit prices  = $0.94 - $0.9=$0.04
Hence, the difference in the unit prices is $0.04.
Learn more about the unit prices here:
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